JS1-3V General Purpose Relay SPDT 3VDC Equivalent & Substitute Parts

Part Overview

The JS1-3V is a general purpose relay manufactured by Panasonic Electric Works, featuring a single pole double throw (SPDT) contact configuration with a 3VDC coil. This through-hole mounted relay is rated for 10A switching capacity and is designed for applications requiring reliable electromagnetic switching in industrial and commercial equipment.

The JS1-3V is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this relay.

Substiute Parts

JS1-3V

Panasonic Electric WorksIn Stock: 1144JS1-3V Datasheet

Current PartRFQ

J1071CS3VDC.36

CIT Relay and SwitchIn Stock: 2521J1071CS3VDC.36 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JS1-3V is determined by the following critical parameters that must be maintained or exceeded:

• Coil Voltage: 3VDC (exact match required for direct circuit compatibility)
• Contact Form: SPDT (1 Form C) configuration (functional switching topology must be identical)
• Mounting Type: Through Hole (physical board integration requirement)
• Coil Current: 120 mA (driver circuit compatibility)
• Coil Resistance: 25 Ohms (circuit impedance matching)
• Contact Rating (Current): Minimum 10 A (switching capacity must equal or exceed original specification)
• Switching Voltage: Must support at least 250VAC and 100VDC maximum ratings

The substitute part J1071CS3VDC.36 meets all critical substitution criteria. It maintains identical coil voltage, contact form, mounting type, coil current, and coil resistance. The substitute provides enhanced contact rating (15 A versus 10 A) and extended operating temperature range (-40°C ~ 125°C versus -40°C ~ 70°C), making it suitable for applications with equivalent or more demanding requirements.

Parameter Comparison

Engineering Selection Recommendations

The J1071CS3VDC.36 is the qualified substitute for the obsolete JS1-3V relay. Selection is based on the following engineering criteria:

Product Status: The substitute part maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

Compliance and Certifications: Both parts share identical REACH status (REACH Unaffected) and ECCN classification (EAR99), maintaining regulatory compliance. The substitute achieves RoHS3 compliance, providing additional environmental compliance assurance.

Functional Equivalence: The substitute maintains all critical electrical parameters—coil voltage, contact form, coil current, and coil resistance—ensuring direct circuit compatibility without modification to driver circuits or control logic.

Enhanced Capability: The substitute provides increased contact current rating (15 A versus 10 A) and extended operating temperature range (-40°C ~ 125°C versus -40°C ~ 70°C), supporting applications with equivalent or more demanding environmental and electrical requirements.

Physical Integration: Identical through-hole mounting and PC pin termination ensure mechanical compatibility with existing printed circuit board layouts and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the J1071CS3VDC.36 be used as a direct replacement for the JS1-3V without circuit modifications?

A: Yes. The substitute maintains identical coil voltage (3VDC), coil current (120 mA), coil resistance (25 Ohms), and contact form (SPDT). No modifications to driver circuits, control logic, or board layout are required.

Q: What is the difference in switching voltage ratings between the original and substitute parts?

A: The JS1-3V supports 250VAC and 100VDC maximum switching voltages. The J1071CS3VDC.36 supports 125VAC and 30VDC maximum switching voltages. Applications operating at the original part's maximum voltage ratings must be evaluated to confirm the substitute's voltage capability is sufficient for the intended switching application.

Q: Does the substitute part have better temperature performance?

A: The J1071CS3VDC.36 operates across -40°C ~ 125°C, compared to the original part's -40°C ~ 70°C range. This extended temperature capability supports applications in more demanding thermal environments.

Q: Are the contact materials different between the two parts?

A: Yes. The JS1-3V uses Silver Alloy contacts, while the J1071CS3VDC.36 uses Silver Tin Oxide (AgSnO) contacts. Both materials are suitable for general purpose relay applications. Contact material selection may influence performance in specific switching applications involving particular load types or environmental conditions.

Q: What is the current rating difference, and does it affect substitution?

A: The JS1-3V is rated for 10 A, while the J1071CS3VDC.36 is rated for 15 A. The substitute's higher rating ensures adequate margin for applications operating at or near the original part's 10 A specification.

Q: Are both parts available in the same packaging format?

A: The JS1-3V is supplied with standard packaging. The J1071CS3VDC.36 is supplied in box packaging. Both parts use identical through-hole PC pin termination suitable for standard printed circuit board assembly processes.

Q: What compliance certifications apply to the substitute part?

A: The J1071CS3VDC.36 is RoHS3 compliant and maintains REACH Unaffected status. Both parts share EAR99 export classification and MSL 1 (Unlimited) moisture sensitivity rating.